Timing mechanism.



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R. M. G. PHILLIPS. TIMING MECHANISM. .APPLICATIONFILED AUG.2I, I916- Patented Sept. 1L 1917.

R. M. G. PHILLIPS. TIMING MECHANISM. APPLICATION FILED Aus.21. 191a.

Patented Sept. 11, 1917,

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noss N. e. rHrLLrrsor wnsT HAVEN, CONNECTICUT, assreNon To THE SENTINEL me. on, or HAVEN, .CCNNECTICUT, a CORPORATION.

TIMING MECHANISM.

Specification of Letters Patent. Patented Sept, 11, 1911 "3'.

Application filed August 21,1916. Serial No. 115,965.

To all whom it may concern:

Be it known that 1, Ross M. G. PHILLIPS, a citizen of the United States, residing at West Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Timing Mechanism; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a view in front elevation of a timing-mechanism constructed in accordance with my invention, shown in its set and cocked position.

Fig. 2 arreverse plan view thereof, showing the device in its normal or fired position.

Fig. 3 a view thereof, partly in right hand side elevation, and partly-in vertical section, in the same position.

Fig. 4 a rear view thereof with the backplate removed, with the parts in the same position;

Fig. 5 a detached perspective view of the firing-cam and its hub.

Fig. 6 a broken view of the upper end of the setting-lever. I

My invention relates to an improved timing-mechanism for use in conjunction with apparatus designed to be set to be operated at a predetermined time, the mechanism being primarily designed to be used as an adjunct of heating apparatus the heat of which is shut ofi after the lapse of a predetermined interval.

The object of my present'invention is to produce a simple, convenient and reliable timing-mechamsmcharacterized by its adaptation to be cocked by the act of turning on the fuel.

With these ends in view, my invention consists in a timing-mechanism having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, the stem 2 of the valve-plug 3 is pro? vided with a collar 4 having an offsetting lug 5 receiving a screw-stud 6 by means of which an upwardly extending link 7 is connected with the as-cock handle 8 for operation thereby, t e lower end of the link 7 w withered ottthrough which the screw-stud 6 passes. The said handle 8 is secured to the projecting outer end of the stem 2 by means of a screw 10. The valve-plug 3 is located in a tapering chamber 11 formed in a valve-body 12 the ends of which are formed with threaded recesses 13 for the reception of the gas pipes which are not shown. The valve-body 12 is also formed with small tapped recesses 14 intersecting the recesses 13 and provided for pilot-light connections which are not shown. It will be understood that one or the other of the two tapped recesses 14 will be plugged according to which of the two recesses 13 receives the intake gas pipe. A spring 15 flange which overlaps the rear edge of the casing 17.

Theupper end of the link 7 is connected by a screw-stud 19 to a lifting-lever 20 pivotally hung upon a screw-stud 21 mounted in an assembling-plate 22 secured. to the in ner face of the flat front of the casing 17 As viewed from Fig. 1, the left hand end of the lifting-lever 20 is connected with the lower end of a spring 23 the upper end of which is fastened to the plate 22 by means of a screw 24,1the said spring 23 providing power for turning the valve-plug 3 and so turning ofi the gas at the expiration 'of the predetermined time to which the apparatus is set. i

The opposite end of the lifting-lever 21 is connected by a screw-stud 25 with the lower end of a cocking-link 26 the outer edge of which is formed with a cocking-notch 27 and 'the upper end of which is connecited by a stud 28 with a short link 29 swive ed u on the assembling-plate 22 by means 0 a screwstud 30.

The cocking-notch 27 of the cocking-lever 26 receives a trigger-finger 31 turned rearwardly at a right angle from the plane of a trigger 32' pivotally mounted upon a screwstud 33 in the assembling-plate 22. The upper end of the said trigger 32 is formed with a rearwardly turned tripping-arm 34 co-acting with the cam-face 35 and sto ger 36 of a it 37 formed at t e rear end of a hub 38 which projects forward through the front-ofthe casing 17, the projecting forward end of the hub 38 having a square shoulder 39 which is entered into a square opening 40 formed in the upper end of a setting-lever41 which is furnished at its lower end with a handle 42 and at its upper end with a pointer 43 which-sweeps over graduations upon a dial 44 secured to the outer face of the front of the'casing 17 end of the arbor 48 holds the setting-lever 41 in place upon the squared shoulder 39 of" the hub 38 of a cocking-cam 37.

Loosely mounted upon the arbor 48, is a main wheel 52 which meshes into a pinion 53 upon thearbor 54 of the escapement-train which may be of any approved construction and which it is unnecessary to describe in detail. The said main-wheel 52 carries a spring-actuated pawl 55 engaging with the teeth of a ratchet-wheel 56 loosely mounted upon the arbor 48 and bearing directly upon the front face of the main-Wheel 52 against which it is pressedby a coupling or frictiondisk 57 non-rotatably mounted upon the arbor 48 but longitudinally movable there upon and pressed against the said ratchetwheel 56 by a spring 58' encircling the said arbor and abutting at its outer end against a nut 59 mounted upon a threaded portion of the said arbor 48, whereby the tension of the spring 58 may be adjusted as desired to increas or decrease the friction between the friction-disk 57 and the ratchet-wheel 56. The tension of the spring 58 must be sufficient to crowd the disk 57 against the ratchet-"wheel 56 so as to develop the friction required to couple them for rotation together when the setting-lever 41 is turned counter clockwise for concurrently winding the main-spring 60 and setting the timing mechanism. 7 In resettin the mechanism to shorten the period to w ich it was set and to correspondingly unwind the main-spring 60, the lever 41 is turned clockwise against the friction developed by the spring 58 between the disk 57 and the ratchet Wheel 56 which latter is then held against rotation by the pawl 55, while the main spring is unwound and the pointer 43 swept clockwise over-the dial 44 all as described in United States Patent No. 1,150,514 granted August 17, 1915, to J. W. Gibney. The said spring 48 and the parts co-acting'therewith, thus form means for frictionally couplin the winding-arbor 48 with a member of t e escapement train of the clock-movement, whereby the setting-lever 41 may operate to unwind the main spring 60 after the mechanism has been initially set. The trigger 32 is operated by a trigger-spring 61 having its upper end connected with the trigger and its lower end fastened to a screw 62 in the assemblingplate 22.

In using my improved mechanism, the setting-lever 41 is swun byits handle 42 counter clockwise, where y its pointer 43 is spring 23 placed under tension. At the same time the trigger-link will be pushed upward until its notch 27 has been carried into registration with the upper edge of the triggerfinger 31 which will then snap into the said trigger-notch under the action of the trigger spring 61. The device has now been cooked by the act of turning on the gas, which is the characteristic feature ofmy present invention as explained at the outset of this description. Now due to the long valve-plug 3 may be turned by the handle 8 as required for regulating the flow of gas without disturbing the cooked condition of the apparatus.

As soon as the hand is removed from the setting-lever41, the escapement-train will begin to run and slowly turn the firing-cam 37 clockwise, whereby its cam-face 35 will ultimately engage with the upper end of the trigger-armo34 and push the trigger-finger 31 out of the cockin -notch 27 When the stop-lug 36 of the ring-cam 37 engages .with theupper end of the trigger-arm 34 slot 9 in the lower end of the link 7, the v clock-movement is stopped. The moment the trigger-finger 31 is fully pushed out of the trigger-notch 27, the spring 23 will operate to lift the lever 20, and hence the link 7 which will automatically efiect the turning of the valve-plug 3 into its shut-off position in which it is shown in Fi s. 2, 3 and 4 of the drawings. It will thus e seen that by means of my improvement, the manual turning on of the gas or other fuel ef fects the cooking of the apparatus, and that the firing, so to speak, of the apparatus, gfli'elcts the shutting off of the gas or other I claim 1. In a timing-mechanism, the combination withan escapement-train, of a settinglever therefor, a cocking-mechanism, a fuelcontrol, and connection between the cockingmechanism and the fuel-control, whereby the manual turning on of the fuel cocks the cocking-mechanism, and the firing of the cocking-mechanism operates the fuel-co11trol to shut off the supply of fuel, the said mechanisms being constructed and arranged to permit the fuel-control to be operated for the regulation of the fuel after the cocking of the cocking-mechanism without firing the same.

2. In a timing mechanism, the combination with an escapement-train, of a settinglever therefor, a firing-cam operated by the said train, a trigger operated by the said cam, a cocking-lever co-acting with the said trigger, and connection between the said fuel-control and the cocking-lever, whereby when the fuel is turned on the said lever is operated for being engaged by the trigger.

8. In a timing-mechanism, the combination with an escapement-train, of a settinglever, a firing-cam operated by the said train, a trigger co-acting with the said earn, a cocking-lever co-acting with the said trigger, a lifting-lever connected with the cock ing-lever, a fuel-control, and a link connecting the fuel-control with the lifting-lever, whereby the said lever is operated for cocking the mechanism when the fuel-control is operated for turning on the fuel.

ROSS M. G. PHILLIPS. 

